Pkocess of dyeing wool



Patented Apr. 7, 1936 UNITED STATES PATENT OFFIE PROCESS OF DYEING WOOL Hans Krzikalla and Walter Limbacher, Ludwigshafen-on-the-Rhine, Germany, assignors to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. Application September 5, 1934, Serial No. 742,801. In Germany September 30, 1933 6 Claims. (01. 8-5) The present invention relates to a process of dyeing Wool.

We have found that wool may advantageously Table-Continued Shade obtained be dyed according to the single-bath process while Dim component Coupling component z ggg employing chromium compounds, by means of azo the Single. dyestuffs containing but one sulphonic acid group bath Process in the molecule which are obtainable by coupling the diazo compound of a diazotizable aro- 1-mei1ioxy-4- ami obeny o yo p e- Orange matic amine free from carboxylic acid groups, j 3g Orange nitro groups and halogen and having no hydroXy Zene sulphonic q d group in the ortho-position to the amino group, LemmyAfimmbenzene" ;?11 3 fi3it Orange with S-hydro-xyquinoline. The sulphonic acid yli i 8- ydr Xyoui1 1in -5- range group may be contained in the amine or the 8 Sulphomc and hydroxyquinoline employed.

The process is preferably carried out by charg- Ylhat We Clalm 1s: th 15 mg the dya'batl; withfabout 3 to 8 by single?b a t l i iir fni ii ni cinfgo finid gg ei g paces:

i h f mix ure ammonium c roma e or :fdi ur; zzhiomate and ammonium sulphate prewhich comprisfss emploringem dyestufi's i viously dissolved by boiling, and adding to the able by cmlphng dmotlzed aromgfic amlne bath the dissolved dyestuif together with 10 per free from carboxyllq acld groups mtro groups cent of Glaubers salt (calculated with reference and en and havlng no hydroxy group in the to the Weight of the goods to be dyed). The wool g f i to the ammo group Wlth an i is introduced at room temperature or at 50 to t g i of the componen s 60 C. and then the dye-bath is slowly heated to g f p 22 as? cordip to the boiling and kept boiling for 1 to 2 hours. Sin-1 if i ye g d f 25 The dyeings obtained are distinguished by exgea Ommm P proqess ellent properti s as regards astness as for ex- Whlch compnses employmg am dyestuffs Obtam able by coupling the monosulphomc acid of a diample fastness l f fulhng and hght' azotized aromatic amine free from carboxylic Dyestuffs i p Suitable for the purpose of acid groups, nitro groups and halogen and having the present mvention may be prepared by emno hydroxy group in the orthmposmon to the ploying the components set forth in the followamino group, with an 8 h d i ,1 free ing table, but the invention is not restricted to fro Smphonic acid groups thes SD fi examples- 3. A process of dyeing WOO-1 according to the single-bath chromium compound dyeing process Table which comprises employing azo dyestuffs obtainable by coupling a diazotized aromatic amine free Shade obltained from sulphonic and carboxylic acid groups, nitro bath pmcess an 8-hydroxyquinoline-5su1phonic acid.

4. The process of dyeing wool according to the 1-aminobenzene-4-su1- B-hydroxyquinoline--. Orange i 1 b th h i compound dyeing process 1- i 1 i 1 1%% ;1 Zene-3-Sl11- 8-hydroxyquinoline Orange which mpris p qy g the azo y fi 0 1-: ainiiifolilrene-Z-sul- 8-hydroxyquinoline Orange s i i i gl i i fi c i? s'hydmxyquinolinem Orange 5. The process of dyeing wool according to the l-lznetlllytlll-iiminpgenzene- 8-hydr0xyquinoline Orange siggllel-bath chromiurrll compggmd dyeiing tpigacegs i w ic com rises empo in e azo es u o z giiipidi i c c i slhydmxyqumolfnem Orange tainable by coupling di zofized l-amir i obenzenes 5O 'gfigfghfg fgifi g fg' shydmxyquinohmm Red 3-sulphonic acid with 5-chloro-8-hydroxyquin- 1-naphthylamine-4-sul- 8-hydroxyquinoline.-- Red brown oline.

1 P&%%%gf Sn} 5 me thyl s hydroxy Red orange 6. The process oi dyelng wool according to the Phonic acid q e single-bath chromium compound dyeing process gfiif 'fiii figi ifg Orange which comprises employing the azo-dyestufi" ob- 2g; f f fg f Yellow brown tainable by coupling diazotized l-methoxy4- gl'line 8-hydroxyquinoline-5- Orange yellow aminobenzene with 8-hydroxyquino1ine-5-sulsulphonic acid phonic acicL 1-methyl-4-am1nobenzene 8-htyldrlggggluiioilme-5- Orange S KRZIKALLA l-methyl-B-aminobenzene 8-lzil l liirgggiiuiiiolline-fi- Orange W ALTER LIMBACEER 

